package day02;

public class DoubleDemo {
    public static void main(String[] args) {
        //double:双精度浮点型，8个字节
        double a= 3.14;   //3.14为小数直接量，默认为double型
        float b = 3.14F;  //3.14F为float型直接量

        double c = 3, d = 2.9;
        System.out.println(c-d);  //0.10000000000009,发生舍入误差了
        double e = 6.0, f = 4.9;
        System.out.println(e-f);  //1.09999999999996，发生摄入误差了
        double g = 6.0, h = 1.9;
        System.out.println(g-h);  //4.1，没有发生摄入误差

    }
}
